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There is similar problem(http://community.rapidminer.com/t5/Developer-Forum/How-to-use-Log-transform-and-missing-values/m-p/40602). However, new question is how to log transform entire example set, all most all the attribute. Could you kindly provide your suggestion?
hello @wanglu2014 - do you mean taking log() of some attribute? If so, you can just use the function generator with the Generate Attributes operator.
Scott
ah ok you want to take log() of each attribute. Then you want to Loop Attributes and take log() of each one. Like this:
<?xml version="1.0" encoding="UTF-8"?><process version="7.6.001"> <context> <input/> <output/> <macros/> </context> <operator activated="true" class="process" compatibility="7.6.001" expanded="true" name="Process"> <process expanded="true"> <operator activated="true" class="generate_data" compatibility="7.6.001" expanded="true" height="68" name="Generate Data" width="90" x="45" y="85"/> <operator activated="true" breakpoints="after" class="select_attributes" compatibility="7.6.001" expanded="true" height="82" name="Select Attributes" width="90" x="179" y="85"> <parameter key="attribute_filter_type" value="single"/> <parameter key="attribute" value="label"/> <parameter key="invert_selection" value="true"/> <parameter key="include_special_attributes" value="true"/> </operator> <operator activated="true" class="remember" compatibility="7.6.001" expanded="true" height="68" name="Remember" width="90" x="313" y="85"> <parameter key="name" value="foo"/> </operator> <operator activated="true" class="concurrency:loop_attributes" compatibility="7.6.001" expanded="true" height="82" name="Loop Attributes" width="90" x="447" y="85"> <parameter key="enable_parallel_execution" value="false"/> <process expanded="true"> <operator activated="true" class="recall" compatibility="7.6.001" expanded="true" height="68" name="Recall" width="90" x="112" y="136"> <parameter key="name" value="foo"/> </operator> <operator activated="true" class="generate_attributes" compatibility="7.6.001" expanded="true" height="82" name="Generate Attributes" width="90" x="246" y="136"> <list key="function_descriptions"> <parameter key="%{loop_attribute}" value="log(eval(%{loop_attribute}))"/> </list> </operator> <operator activated="true" class="remember" compatibility="7.6.001" expanded="true" height="68" name="Remember (2)" width="90" x="447" y="136"> <parameter key="name" value="foo"/> </operator> <connect from_op="Recall" from_port="result" to_op="Generate Attributes" to_port="example set input"/> <connect from_op="Generate Attributes" from_port="example set output" to_op="Remember (2)" to_port="store"/> <portSpacing port="source_input 1" spacing="0"/> <portSpacing port="source_input 2" spacing="0"/> <portSpacing port="sink_output 1" spacing="0"/> </process> </operator> <operator activated="true" class="recall" compatibility="7.6.001" expanded="true" height="68" name="Recall (2)" width="90" x="581" y="85"> <parameter key="name" value="foo"/> </operator> <connect from_op="Generate Data" from_port="output" to_op="Select Attributes" to_port="example set input"/> <connect from_op="Select Attributes" from_port="example set output" to_op="Remember" to_port="store"/> <connect from_op="Remember" from_port="stored" to_op="Loop Attributes" to_port="input 1"/> <connect from_op="Recall (2)" from_port="result" to_port="result 1"/> <portSpacing port="source_input 1" spacing="0"/> <portSpacing port="sink_result 1" spacing="0"/> <portSpacing port="sink_result 2" spacing="0"/> </process> </operator></process>
Hi,
maybe Generate Function Set is a solution.
Best,
Martin
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